515 



co-operation ; and to this letter has been appended a statement, 

 setting forth the objects of the proposed organization. 



" Your Council have only to add their expectation, that the pre- 

 liminary arrangements will be completed in two months from the 

 present time, and that the regular series of observations may be 

 commenced on the 1st of July." 



The President communicated some notes on the storm 

 which visited Dublin on the 18th April last. 



" Having watched attentively the progress of the late storm 

 from a favourable position, and collected some facts relative to 

 it from the records of the Observatory,"and from other sources, 

 I avail myself of the present opportunity to lay them before 

 the Academy. The phenomena were of a nature so unusual 

 (I may say unexampled) in these climates, that it is desirable 

 that some notice of them, however imperfect, should be placed 

 on record ; and the present summary of facts is offered, chiefly 

 in the hope that it may serve as a nucleus to a more complete 

 one. 1 shall limit myself, mainly, to those which have an 

 immediate scientific bearing. 



" The morning of the 18th was fine in Dublin, with bright 

 sunshine, light cirrous clouds being scattered loosely over the 

 sky ; at ten o'clock these became diffused, and the sky was 

 evenly, but lightly overcast. 



" From the tracings of the self-registering anemometer, 

 erected in Trinity College, it appears that on the 17th, and 

 during the morning of the 18th, the wind blew gently from 

 the south-west. Towards noon, on the latter day, it gradually 

 veered to the south, and continued at that point until the ar- 

 rival of the storm. This veering of the wind, however, ap- 

 pears to have been confined to the lower current ; the direction 

 of the upper current, as estimated by the motion of the clouds, 

 appeared to be nearly south-west. 



" The first indications of the approach of the storm were 

 observed soon after three o'clock. Massive cumuli were seen 



